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OpenAI: GPT-5.5 vs Z.ai: GLM 5.2

Summary

GPT-5.5 (low) vs GLM 5.2 (high) benchmark comparison: GPT-5.5 (low) leads on average score with 9.3 vs 8.0. GLM 5.2 (high) has the lower benchmark cost at $0.554 vs $0.907. GPT-5.5 (low) is faster at 9.76s vs 37.09s, with pass rates of 85.7% vs 77.8%.

Recommended model: GPT-5.5 (low) - It has the best score here (9.3), while responding about 3.8x faster than GLM 5.2 (high).

Last updated at: 2026-07-10

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GLM 5.2 GLM 5.2 high Release: 2026-06-17
Score 9.3 8.0
Rank #7 #32
Reliability 10.0 9.3
Consistency 10.0 7.6
Tests Correct
Attempt pass rate 85.7% 77.8%
Flaky tests 0 6
Total Runs 63 63
Cost per result 5.035 4.255
Total Cost $0.907 $0.554
Input Price $5.000 / 1M $0.770 / 1M
Output Price $30.000 / 1M $2.420 / 1M
Total Input Tokens 34,209 34,993
Output Tokens 2,046 51,575
Reasoning Tokens 22,460 166,065
Response Time (avg) 9.76s 37.09s
Response Time (max) 56.19s 180.69s
Response Time (total) 204.92s 778.91s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#7 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 tok

#32 GLM 5.2

high
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 4.41s 606 238 1,020
GLM 5.2 10.0 10.0 100.0% 0 5.80s 639 406 2,660
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
GLM 5.2 6.4 4.4 77.8% 2 73.03s 5,124 2,302 22,546
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 9.56s 11,019 303 717
GLM 5.2 10.0 10.0 100.0% 0 43.51s 12,696 711 4,267
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 3.28s 7,140 228 157
GLM 5.2 10.0 10.0 100.0% 0 5.81s 7,143 435 1,414
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 5.3 10.0 33.3% 0 28.05s 723 69 11,609
GLM 5.2 3.5 4.4 33.3% 2 73.97s 551 46,693 90,566
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 5.17s 477 133 245
GLM 5.2 10.0 10.0 100.0% 0 12.90s 498 63 1,743
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 9.9 10.0 100.0% 0 3.74s 660 93 415
GLM 5.2 10.0 10.0 100.0% 0 4.26s 678 151 1,210
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 4.74s 642 279 954
GLM 5.2 6.0 4.6 66.7% 2 33.71s 665 568 22,392
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 4.96s 5,445 250 101
GLM 5.2 10.0 10.0 100.0% 0 9.25s 6,861 246 503
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 3.0 10.0 0.0% 0 10.06s 195 30 840
GLM 5.2 3.0 10.0 0.0% 0 127.82s 138 0 18,764

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